Scrap tires could gain a new purpose as ingredients for construction materials, thanks to research at Missouri University of Science and Technology.
Discarded tires are a big problem. Landfills are teeming with them and they can harbor disease-carrying mosquitos and rodents. Stockpiles of old tires also burn easily — creating fires that can quickly get out of control and may burn for months or even years.
But the longevity and resilience of scrap tires also makes them ideal for other uses.
Dr. Mohamed A. El Gawady, a researcher at Missouri S&T, is currently testing new masonry blocks made with ground tires.
“Rubber has a lot of benefits in addition to its sustainability,” says El Gawady, associate professor of civil, architectural and environmental engineering. “It’s very durable and provides good insulation. Among their many potential benefits, these new blocks could cut heating bills by 50 percent.”
ElGawady has been working with Midwest Block and Brick, a Jefferson City, Mo.-based company, to create the blocks, which are made from sand and scrap tires ground to fine particles.
These rubber-added blocks, called rubberized blocks, were constructed with a variety of ratios of sand to rubber particles before coming up with the right balance.
“The rubber makes the blocks a bit weaker, so after testing various percentages, we now only replace about 20 percent of the sand with rubber, so the blocks retain their strength,” ElGawady says.
He and his students use a compression machine to test and compare the strength of prisms built with the rubberized blocks to conventional concrete masonry blocks.
Both rubberized and conventional blocks are being tested in an environmental chamber at Missouri S&T. In the chamber, the blocks undergo cycles of extreme temperatures and humidity levels, simulating different weather conditions. The rubberized blocks are also tested under cyclic compression loads simulating earthquake loads.
“Construction with these new blocks could improve a building’s resiliency during an earthquake by acting as shock absorbers,” says ElGawady.
Related Stories
Retail Centers | Jul 21, 2016
MVRDV designs Seoul entertainment district with gold entrance and curtain façade
The 9,800-sm complex will have retail and nightclub space. A plaza separates the two concrete buildings.
Healthcare Facilities | Jul 20, 2016
Process mapping simplifies healthcare design
Charting procedures and highlighting improvement opportunities can lead to developing effective design strategy simulations. GS&P’s Ray Wong writes that process mapping adds value to a project and bolsters team and stakeholder collaboration.
Architects | Jul 20, 2016
AIA: Architecture Billings Index remains on solid footing
The June ABI score was down from May, but the figure was positive for the fifth consecutive month.
| Jul 19, 2016
2016 GIANTS 300 REPORT: Ranking the nation's largest architecture, engineering, and construction firms
Now in its 40th year, BD+C’s annual Giants 300 report ranks AEC firms by discipline and across more than 20 building sectors and specialty services.
Architects | Jul 18, 2016
17 buildings designed by Le Corbusier added to UNESCO World Heritage List
The sites are spread across seven counties and were built over the course of 50 years. Le Corbusier, an architect, designer, and urban planner, was a founder of modern architecture.
Multifamily Housing | Jul 18, 2016
Four residential projects named winners of the 2016 AIA/HUD Secretary Awards
Affordable housing, specialized housing, and accessible housing projects were honored.
Sports and Recreational Facilities | Jul 18, 2016
Turner and AECOM will build the Los Angeles Rams’ new multi-billion dollar stadium project
The 70,000-seat stadium will be ready by the 2019 NFL season. The surrounding mixed-use development includes space for retail, hotels, and public parks.
High-rise Construction | Jul 15, 2016
Zaha Hadid designs geometric flower-shaped tower for sustainable Qatar city
The 38-story building will have a mashrabiya latticed facade with hotel and residential space inside.
Building Team | Jul 11, 2016
Design-assist: The way to really fly [AIA course]
Experts explain the benefits of DA, a process where the subcontractors are retained to assist other Building Team members in the development of a design. Earn 1.0 AIA CES learning units by reading and taking the exam.
Building Team | Jul 11, 2016
Addressing client concerns about design-assist
Common concerns about DA include lack of familiarity, obtaining competitive pricing, and design liability.